package com.entboost.im.exception;

import java.io.File;
import java.io.FileOutputStream;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.io.Writer;
import java.lang.Thread.UncaughtExceptionHandler;
import java.lang.reflect.Field;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;

import net.yunim.eb.api.runnable.ThreadPool;
import net.yunim.service.cache.FileCacheUtils;
import net.yunim.service.cache.ServiceListener;
import android.annotation.SuppressLint;
import android.app.NotificationManager;
import android.content.Context;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.content.pm.PackageManager.NameNotFoundException;
import android.os.Build;
import android.os.Environment;
import android.os.Looper;
import android.widget.Toast;

import com.entboost.Log4jLog;
import com.entboost.im.MainActivity;
import com.entboost.im.global.UIUtils;
import com.entboost.ui.base.activity.MyActivityManager;

@SuppressLint("SimpleDateFormat")
public class CrashHandler implements UncaughtExceptionHandler, ServiceListener {

	/** The tag. */
	private static String TAG = CrashHandler.class.getSimpleName();
	private static String LONG_TAG = CrashHandler.class.getName();

	// CrashHandler 实例
	private static CrashHandler INSTANCE = new CrashHandler();

	// 程序的 Context 对象
	private Context mContext;

	// 系统默认的 UncaughtException 处理类
	private Thread.UncaughtExceptionHandler mDefaultHandler;

	// 用来存储设备信息和异常信息
	private Map<String, String> infos = new HashMap<String, String>();

	// 用于格式化日期,作为日志文件名的一部分
	private DateFormat formatter = new SimpleDateFormat("yyyy-MM-dd-HH-mm-ss");

	/** 保证只有一个 CrashHandler 实例 */
	private CrashHandler() {
	}

	/** 获取 CrashHandler 实例 ,单例模式 */
	public static CrashHandler getInstance() {
		return INSTANCE;
	}

	/**
	 * 初始化
	 * 
	 * @param context
	 */
	public void init(Context context) {
		mContext = context;

		// 获取系统默认的 UncaughtException 处理器
		mDefaultHandler = Thread.getDefaultUncaughtExceptionHandler();

		// 设置该 CrashHandler 为程序的默认处理器
		Thread.setDefaultUncaughtExceptionHandler(this);
	}

	//获取最上层Activity的类名
//	private String getTopRunningActivityName() {  
//        ActivityManager activityManager = (ActivityManager)mContext.getSystemService(Context.ACTIVITY_SERVICE); 
//        String runningActivity = activityManager.getRunningTasks(1).get(0).topActivity.getClassName();
//        return runningActivity;               
//	}
	
	/**
	 * 当 UncaughtException 发生时会转入该函数来处理
	 */
	@Override
	public void uncaughtException(Thread thread, Throwable ex) {
		if (!handleException(ex) && mDefaultHandler != null) {
			// 如果用户没有处理则让系统默认的异常处理器来处理
			mDefaultHandler.uncaughtException(thread, ex);
		} else {
//			String className = getTopRunningActivityName();
			
//		    Intent intent = new Intent();
//		    intent.setClass(mContext, mCls);
//		    mContext.startActivity(intent);
			
			try {
				Thread.sleep(3000);
			} catch (InterruptedException e) {
				Log4jLog.e(LONG_TAG, "error : ", e);
			}
			
			//清除通知栏内容
			NotificationManager mNotificationManager = (NotificationManager) mContext.getSystemService(Context.NOTIFICATION_SERVICE);
			mNotificationManager.cancel(UIUtils.messageNotificationID);
			
			//退出所有Activity
			MyActivityManager.getInstance().clearAllActivity();
			
			// 退出程序,注释下面的重启启动程序代码
			android.os.Process.killProcess(android.os.Process.myPid());
			System.exit(0);
			
			// 重新启动程序，注释上面的退出程序(调试状态不重启)
//			 Intent intent = new Intent();
//			 intent.setClass(mContext, WelcomeActivity.class);
//			 intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
//			 mContext.startActivity(intent);
//			 android.os.Process.killProcess(android.os.Process.myPid());
		}
	}

	/**
	 * 自定义错误处理，收集错误信息，发送错误报告等操作均在此完成
	 * 
	 * @param ex
	 * @return true：如果处理了该异常信息；否则返回 false
	 */
	private boolean handleException(Throwable ex) {
		if (ex == null) {
			return false;
		}

		// 使用 Toast 来显示异常信息
		new Thread() {
			@Override
			public void run() {
				Looper.prepare();
				Toast.makeText(mContext, "很抱歉，程序出现异常，即将退出。", Toast.LENGTH_LONG)
						.show();
				Looper.loop();
			}
		}.start();

		// 收集设备参数信息
		collectDeviceInfo(mContext);
		// 保存日志文件
		saveCrashInfo2File(ex);
		//处理应用程序的清理工作
		ThreadPool.closeThreadPool();
		return true;
	}

	/**
	 * 收集设备参数信息
	 * 
	 * @param ctx
	 */
	public void collectDeviceInfo(Context ctx) {
		try {
			PackageManager pm = ctx.getPackageManager();
			PackageInfo pi = pm.getPackageInfo(ctx.getPackageName(),
					PackageManager.GET_ACTIVITIES);

			if (pi != null) {
				String versionName = pi.versionName == null ? "null"
						: pi.versionName;
				String versionCode = pi.versionCode + "";
				infos.put("versionName", versionName);
				infos.put("versionCode", versionCode);
			}
		} catch (NameNotFoundException e) {
			Log4jLog.e(LONG_TAG, "an error occured when collect package info", e);
		}

		Field[] fields = Build.class.getDeclaredFields();
		for (Field field : fields) {
			try {
				field.setAccessible(true);
				infos.put(field.getName(), field.get(null).toString());
				Log4jLog.d(LONG_TAG, field.getName() + " : " + field.get(null));
			} catch (Exception e) {
				Log4jLog.e(LONG_TAG, "an error occured when collect crash info", e);
			}
		}
	}

	/**
	 * 保存错误信息到文件中 *
	 * 
	 * @param ex
	 * @return 返回文件名称,便于将文件传送到服务器
	 */
	private String saveCrashInfo2File(Throwable ex) {
		StringBuffer sb = new StringBuffer();
		for (Map.Entry<String, String> entry : infos.entrySet()) {
			String key = entry.getKey();
			String value = entry.getValue();
			sb.append(key + "=" + value + "\n");
		}
		Writer writer = new StringWriter();
		PrintWriter printWriter = new PrintWriter(writer);
		ex.printStackTrace(printWriter);
		Throwable cause = ex.getCause();
		while (cause != null) {
			cause.printStackTrace(printWriter);
			cause = cause.getCause();
		}
		printWriter.close();

		String result = writer.toString();
		sb.append(result);
		try {
			long timestamp = System.currentTimeMillis();
			String time = formatter.format(new Date());
			String fileName = "crash-" + time + "-" + timestamp + ".log";
			if (Environment.getExternalStorageState().equals(
					Environment.MEDIA_MOUNTED)) {
				String path = FileCacheUtils.getCrashPath();
				File dir = new File(path);
				if (!dir.exists()) {
					dir.mkdirs();
				}
				FileOutputStream fos = new FileOutputStream(path + fileName);
				fos.write(sb.toString().getBytes());
				fos.close();
			}

			return fileName;
		} catch (Exception e) {
			Log4jLog.e(LONG_TAG, "an error occured while writing file...", e);
		}

		return null;
	}

	@Override
	public void serviceDown(int type, String detailMessage) {
		Log4jLog.i(LONG_TAG, detailMessage);
		
//		//清除通知栏内容
//		NotificationManager mNotificationManager = (NotificationManager) mContext.getSystemService(Context.NOTIFICATION_SERVICE);
//		mNotificationManager.cancel(UIUtils.messageNotificationID);
//		
//		//退出所有Activity
//		MyActivityManager.getInstance().clearAllActivity();
//		
//		// 重新启动程序
//		Intent intent = new Intent();
//		intent.setClass(mContext, WelcomeActivity.class);
//		intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
//		mContext.startActivity(intent);
//		android.os.Process.killProcess(android.os.Process.myPid());
		
		//退出vm
//		System.exit(0);
	}

	@Override
	public Class getActivity() {
		return MainActivity.class;
	}

	
}